目前LED照明灯具的最大技术难题之一就是散热问题，散热不畅导致LED驱动电源、电解电容器都成了LED照明灯具进一步发展的短板，LED光源早衰的缘由。
The LED lighting lamps and lanterns is one of the major technical problems in the heat dissipation problem, poor heat dissipation lead to LED drive power supply, electrolytic capacitor is short to the further development of LED lighting lamps and lanterns, the LED light source, the causes of premature aging.

 

 
只有尽快导出热量才能有效降低LED灯具内的腔体温度，才能保护电源不在持久的高温环境下工作，才能避免LED光源因长期高温工作而发生早衰。
Only by reducing export quantity of heat to be effective as soon as possible the cavity temperature inside the LED lamps and lanterns, can protect the power supply does not work in the persistent high temperatures, can avoid the LED light source for high temperature for a long time work and produce premature aging.

 

 
正因为LED光源自身没有红外线、紫外线，因此LED光源自身没有辐射散热功能，LED照明灯具的散热途径只能通过与LED灯珠板密切组合的散热器来导出热量。散热器必须具备热传导、热对流、热辐射的功能。
Because of the LED light source itself no infrared, ultraviolet, so the LED light source itself without radiation cooling function, the LED lighting lamps and lanterns of the cooling way only through close combination with LED lamp bead board heat radiator to export. The radiator must have the function of heat conduction, heat convection and heat radiation.

 

 
任何散热器，除了要能快速地把热量从发热源传导到散热器的表面，最主要的还是要靠对流和辐射把热量散发到空气中去。导热只解决了传热的途径，而热对流是散热器的主要功能，散热性能主要由散热面积、形状、自然对流强度的能力决定，热辐射只是辅助的作用。一般来说，如果热量从热源到散热器表面的距离小于5mm，那么只要材料导热系数大于5时，其热量就可导出，其余散热就必须由热对流来主导的了。
Any radiators, in addition to being able to quickly heat the heat from the heat source to the surface of the radiator, the main thing is to radiate the heat into the air by convection and radiation. Way only solves the heat transfer of thermal conductivity, and heat convection is the main function of the radiator, the heat dissipating performance mainly by natural convection heat dissipation area, shape, strength the ability of the decision, the effect of thermal radiation is auxiliary. In general, if the heat from the heat source to the radiator surface distance is less than 5 mm, so as long as the material coefficient of thermal conductivity is greater than 5, the heat can be derived, and the remaining heat must be dominated by heat convection.

 

 
大多数的LED照明光源仍然使用低电压（VF＝3．2V）、大电流（IF＝200－700mA）的LED灯珠，由于工作时热量高，必须使用导热系数较高的铝合金。通常有压铸铝散热器、挤压铝散热器、冲压铝散热器。压铸铝散热器是一种压力铸造零件的技术，将液态锌铜铝合金浇注入压铸机的入料口，经压铸机压铸，铸造出事先设计模具限定的形状散热器。
Most LED lighting sources still use low voltage (VF = 3). 2V), large current (IF = 200-700ma) LED lamp bead, because of high heat in the work, must use the aluminum alloy with high thermal conductivity. Usually have die-casting aluminum radiator, extruded aluminum radiator, pressed aluminum radiator. Die-casting aluminum radiator technology is a kind of pressure casting parts, poured liquid zinc copper aluminum injection into the mouth of die casting machine, the die casting machine die casting, casting out the shape of the mould qualified radiator designed.

 

 
以下是5类散热器的对比分析。
The following is a comparative analysis of five types of radiators.

 

 
压铸铝散热器
Cast aluminum radiator

 

 
生产成本可控，散热翼无法做薄，很难使散热面积最大化。LED灯具散热器常用压铸材料为ADC10和ADC12。
The production cost is controllable, the cooling wing can not be thin, and it is difficult to maximize the heat dissipation area. The used die casting materials for LED lamps are ADC10 and ADC12.

 

 
挤压铝散热器
Extruded aluminium radiator

 

 
是将液态铝通过固定的模具挤压成型，然后将棒材通过机加工切割成需要的形状的散热器，后期加工成本较高。挤压铝散热器如图3所示。散热翼可以做得很多很薄，散热面积得到最大的扩展，散热翼工作时自动形成空气对流扩散热量，散热效果较好。常用材料是AL6061和AL6063。
The liquid aluminum is extruded by a fixed mold, then the bar can be machined and cut into the desired shape radiators, and the later processing cost is higher. The extruded aluminum radiator is shown in figure 3. The cooling wing can do a lot of thin, the heat dissipation area gets the biggest expansion, the cooling wing automatically forms the air convection diffused heat, the cooling effect is better. The commonly used materials are AL6061 and AL6063.

 

 
冲压铝散热器
Pressed aluminium radiator

 

 
是通过冲床和模具对钢铁、铝合金的板材冲压、拉升，使之成为杯筒型的散热器，冲压成型的散热器内外周边平滑，因无翼而散热面积有限。常用铝合金材料是5052、6061、6063。冲压件质量很小，材料利用率高，是一种低成本方案。
Is through the punch and die for steel, aluminum alloy sheet metal stamping, pull to rise, make a cup of tube type of radiator, stamping molding radiator inside and outside perimeter smooth, because there was no wings and the cooling area is limited. The commonly used aluminum alloy materials are 5052, 6061, 6063. The quality of stamping parts is very small, the material utilization is high, is a kind of low cost plan.

 

 
铝合金散热器的导热是比较理想的，比较适用于隔离的开关恒流电源。对于非隔离开关恒流电源来说，需要通过灯具的结构设计做好交流和直流、高压和低压电源的隔离，才能通过CE或UL认证。
The thermal conductivity of aluminum alloy radiator is ideal, which is suitable for the isolated switch constant current power supply. For the non-isolation switch constant current power supply, the separation of ac and dc, high voltage and low voltage power supply needs to be done through the structural design of the lamp, so as to be certified by CE or UL.

 

 
塑包铝散热器
Plastic coated aluminum radiator

 

 
是一种导热塑料外壳铝芯的散热器。导热塑料与铝散热芯在注塑机上一次成型，铝散热芯做埋件，需要预先进行机械加工。LED灯珠的热量通过铝散热芯快速传导给导热塑料，导热塑料利用它的多翼形成空气对流散热，利用它的表面辐射部分热量。
It is a radiator with aluminum core for thermal conductivity. The thermal conductive plastic and aluminum cooling core are formed in the last time of the injection molding machine. The aluminum radiator core is made of embedded parts, which need to be machined in advance. The heat of the LED bulb is transmitted through the aluminum radiator to the conductive plastic rapidly. The thermal conductive plastic USES its multiple wings to form convective heat dissipation, and USES its surface to radiate some heat.

 

 
塑包铝散热器一般利用导热塑料本来的颜色白色和黑色，黑色塑料的塑包铝散热器的辐射散热效果更好一点。导热塑料一种热塑性材料，材料的流动性、密度、韧性、强度都易于注塑成型，具有很好的耐冷热冲击循环特性，绝缘性能优良。导热塑料辐射系数优于普通的金属材料。导热塑料密度比压铸铝和陶瓷小40％，同样形状的散热器，塑包铝的重量可减少将近三分之一；与全铝散热器相比较加工成本低，加工周期短，加工温度低；成品不易碎；客户自备注塑机可进行灯具差异化外形设计生产。塑包铝散热器绝缘性能好，容易通过安规。
The plastic bag aluminum radiator generally USES the color white and black of heat conduction plastic, the radiating effect of the plastic aluminum radiator of black plastic is better. A thermoplastic material of thermal conductivity, the fluidity, density, toughness and strength of the material are easy to be formed by injection molding. It has excellent cold and heat impact cycle characteristics and excellent insulation performance. The thermal conductivity of thermal conductivity is superior to that of ordinary metal materials. The density of thermal conductivity is 40% less than that of die-cast aluminum and ceramic, and the same shape of radiators can reduce the weight of aluminum alloy by nearly a third. Compared with the whole aluminum radiator, the processing cost is low, the processing cycle is short, the processing temperature is low; The finished product is not easily broken; The customer self-provided injection molding machine can carry on the lamp differentiation design production. Plastic wrap aluminum radiator insulation good, easy to pass the safety.

 

 
高导热塑料散热器
High thermal conductivity plastic radiator

 

 
高导热塑料散热器最近发展很快，高导热塑料散热器一种全塑料的散热器，它的导热系数比普通塑料高几十倍，达2－9w／mk，具有优异的热传导、热辐射能力；可应用于各种功率灯具的新型绝缘散热材料，可广泛应用于1W～200W的各类LED灯具。
High thermal conductive plastic radiator recently development soon, a kind of whole plastic radiator radiator for thermal conducting plastics and its coefficient of thermal conductivity is higher than common plastic dozens of times, up to 2-9 w/mk, excellent heat conduction and thermal radiation ability; It can be used in various kinds of LED lamps for 1W ~ 200W.

 

 
高导热塑料耐压等级可达交流6000V，适合采用非隔离开关恒流电源、HVLED的高压线性恒流电源。使这类LED照明灯具易于通过CE、TUV、UL等严格安规检测。HVLED采用高电压（VF＝35－280VDC）、小电流（IF＝20－60mA）工作状态，HVLED灯珠板的发热因此而降低。高导热塑料散热器采用传统的注塑、挤塑机均可。一次成型，成品光洁度高。大幅提升生效率，造型设计灵活度高，可充分发挥设计师的设计理念。高导热塑料散热器采用PLA（玉米淀粉）聚合而成，全降解、无残留、无化学污染，生产过程无任何重金属污染，无污水，无废气，符合全球环保要求。
High thermal conductivity plastic resistance grade can reach ac 6000V. It is suitable for high voltage linear constant current power supply with non-isolation switch constant current power and HVLED. This kind of LED lighting lamp is easy to be tested by strict safety regulations such as CE, TUV and UL. HVLED adopts high voltage (VF = 35-280vdc), small current (IF = 20-60ma) working state, and the heating of HVLED bead plate decreases. High thermal conductive plastic radiator adopts traditional injection molding and extruding machine. Once formed, the finished product has high finish. Greatly improve the efficiency, the design flexibility is high, can give full play to the designer's design concept. High thermal conductive plastic radiator with PLA (corn starch) polymerization and degradation, no residue, no chemical pollution, the production process without any heavy metal pollution, no water, no exhaust gas, conform to the requirements of the global environmental protection.

 

 

 
高导热塑料散热体内部PLA分子间密布纳米级金属离子，在高温下可快速运动，增加热辐射能量。其活力优于金属材料散热体。高导热塑料散热器耐高温，150℃五小时不破裂，不变形，配合高压线性恒流IC驱动方案应用，无需电解电容和大体积电感，大幅提升LED整灯寿命，非隔离电源方案，效率高、成本低。特别适合日光灯管、大功率工矿灯的应用。
The internal PLA molecules of high thermal conductivity plastic radiator are interlining nano-grade metal ions, which can move rapidly at high temperature and increase the energy of thermal radiation. Its vitality is better than that of metal materials. High thermal conductive plastic radiator resistance to high temperature, 150 ℃ for five hours no rupture, deformation, with high voltage linear constant current IC driver program application, without electrolytic capacitor and inductance, large volume significantly improves the life span of LED the whole light, not isolation power supply scheme, high efficiency and low cost. It is especially suitable for the application of daylight lamp tube and high power mining lamp.

 

 
高导热塑料散热器可以设计很多精密的散热翼，散热翼可以做得很多很薄，散热面积得到最大的扩展，散热翼工作时自动形成空气对流扩散热量，散热效果较好。LED灯珠的热量通过高导热塑料直接到散热翼，通过空气对流和表面辐射快速散热。
High thermal conductive plastic radiator can design a lot of precision of the heat dissipation wing, the heat dissipation wing can do a lot of very thin, get the maximum extension cooling area, heat dissipation wing work automatically when the air convection diffusion heat, cooling effect is better. The heat of the LED light bulb goes directly to the cooling wing through high thermal conductivity plastic, and rapidly dissipates heat through air convection and surface radiation.

 

 
高导热塑料散热器密度要比铝轻。铝的密度是2700kg／m³，而塑料的密度为1420kg／m³，差不多为铝的一半，所以同样形状的散热器，塑料散热器的重量只有铝的1／2。而且加工简单，其成型周期可以缩短20－50％，这也就降低了成本的动力。
High thermal conductivity plastic radiators are less dense than aluminum. The density of aluminum is 2700kg/m to the third, while the density of the plastic is 1420kg/m cubed, which is almost half of the aluminum, so the same shape of radiator, the plastic radiator is only 1/2 the weight of aluminum. Moreover, the process of processing is simple, and its forming cycle can be shortened by 20-50%, which also reduces the driving force of cost.